fix(docs): remove old GF_FEATURE_TOGGLES_ENABLE=flameGraph

[korniltsev]

No description provided.

[simonswine]

LGTM

[github-actions]

This PR must be merged before a backport PR will be created.

[github-actions]

This PR must be merged before a backport PR will be created.

[github-actions]

The backport to release/v1.7 failed:

Validation Failed: "Could not resolve to a node with the global id of 'T_kwDOAG3Mbc4AczmP'."

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new branch
git switch --create backport-3446-to-release/v1.7 origin/release/v1.7
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x 857ec2e4b24f0fe69ee48ff63ffd6c725cef0224

When the conflicts are resolved, stage and commit the changes:

git add . && git cherry-pick --continue

If you have the GitHub CLI installed:

# Push the branch to GitHub:
git push --set-upstream origin backport-3446-to-release/v1.7
# Create the PR on GitHub
gh pr create --title '[release/v1.7] fix(docs): remove old GF_FEATURE_TOGGLES_ENABLE=flameGraph' --body 'Backport 857ec2e4b24f0fe69ee48ff63ffd6c725cef0224 from #3446' --label 'type/docs' --label 'backport' --base release/v1.7 --milestone release/v1.7 --web

Or, if you don't have the GitHub CLI installed (we recommend you install it!):

# Push the branch to GitHub:
git push --set-upstream origin backport-3446-to-release/v1.7

# Create a pull request where the `base` branch is `release/v1.7` and the `compare`/`head` branch is `backport-3446-to-release/v1.7`.

# Remove the local backport branch
git switch main
git branch -D backport-3446-to-release/v1.7